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Development at Cold-Hardening Temperatures : The Structure and Composition of Purified Rye Light Harvesting Complex II.在冷驯化温度下的发育：纯化黑麦光捕获复合物 II 的结构和组成。
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Ultrafast chlorophyll b-chlorophyll a excitation energy transfer in the isolated light harvesting complex, LHC II, of green plants. Implications for the organisation of chlorophylls.绿色植物分离的光捕获复合体LHC II中叶绿素b - 叶绿素a的超快激发能量转移。对叶绿素组织的影响。
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Low-temperature energy transfer in LHC-II trimers from the Chl a/b light-harvesting antenna of photosystem II.来自光系统II的叶绿素a/b捕光天线的LHC-II三聚体中的低温能量转移
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光捕获复合物II频域中的非线性偏振光谱：吸收带子结构与激子动力学

Nonlinear polarization spectroscopy in the frequency domain of light-harvesting complex II: absorption band substructure and exciton dynamics.

作者信息

Lokstein H, Leupold D, Voigt B, Nowak F, Ehlert J, Hoffmann P, Garab G

机构信息

Institut für Biologie (Pflanzenphysiologie), Humboldt-Universität zu Berlin, Germany.

出版信息

Biophys J. 1995 Oct;69(4):1536-43. doi: 10.1016/S0006-3495(95)80025-1.

DOI:10.1016/S0006-3495(95)80025-1
PMID:8534824
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC1236384/
Abstract

Spectral substructure and ultrafast excitation dynamics have been investigated in the chlorophyll (Chl) a and b Qy region of isolated plant light-harvesting complex II (LHC II). We demonstrate the feasibility of Nonlinear Polarization Spectroscopy in the frequency domain, a novel photosynthesis research laser spectroscopic technique, to determine not only ultrafast population relaxation (T1) and dephasing (T2) times, but also to reveal the complex spectral substructure in the Qy band as well as the mode(s) of absorption band broadening at room temperature (RT). The study gives further direct evidence for the existence of up to now hypothetical "Chl forms". Of particular interest is the differentiated participation of the Chl forms in energy transfer in trimeric and aggregated LHC II. Limits for T2 are given in the range of a few ten fs. Inhomogeneous broadening does not exceed the homogeneous widths of the subbands at RT. The implications of the results for the energy transfer mechanisms in the antenna are discussed.

摘要

在分离的植物光系统II捕光复合物（LHC II）的叶绿素（Chl）a和b的Qy区域，对光谱子结构和超快激发动力学进行了研究。我们证明了频域非线性偏振光谱法（一种新型的光合作用研究激光光谱技术）的可行性，它不仅可以确定超快布居弛豫（T1）和退相（T2）时间，还能揭示Qy波段复杂的光谱子结构以及室温（RT）下吸收带展宽的模式。该研究为迄今为止假设的“叶绿素形式”的存在提供了进一步的直接证据。特别有趣的是，叶绿素形式在三聚体和聚集的LHC II中的能量转移中具有不同的参与情况。T2的极限值在几十飞秒的范围内。在室温下，非均匀展宽不超过子带的均匀宽度。讨论了这些结果对天线中能量转移机制的影响。